Acxiom Corp. and the American Medical Association are jointly forming HealthCarePro Connect, a physicians database company. HealthCarePro Connect will integrate the AMA's database with Acxiom software and co-market it. The company will also allow physicians to customize their own data. The deal is significant because the AMA's 870,000 doctor-strong database is considered among the best available. However, to date, most attempts to market to physicians over the Internet have met with limited success.